diff --git a/app/build.gradle b/app/build.gradle
index 2e655163..2569e826 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -37,7 +37,7 @@ android {
 }
 
 dependencies {
-    compile 'com.simplemobiletools:commons:2.28.8'
+    compile 'com.simplemobiletools:commons:2.30.4'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 }
 
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 60446b51..e69de29b 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -1,2 +0,0 @@
--renamesourcefileattribute SourceFile
--keepattributes SourceFile, LineNumberTable
diff --git a/build.gradle b/build.gradle
index 1be9f26e..614265d6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,6 +16,7 @@ allprojects {
     repositories {
         jcenter()
         maven { url 'https://jitpack.io' }
+        maven { url "https://maven.google.com" }
     }
 }